396 
CARDUACEAE. 
31. Senecio Harbourii Rydb. Mountains of Colorado.—Alt. 9000-13,000 ft. 
—Silver Plume; mountains south of Ward, Boulder Co.; mountains between 
Sunshine and Ward; Boreas. 
32. Senecio plattensis Nutt. On prairies and in river valleys from western 
Ont. and S. D. to Tex. and Colo.—Alt. 4000-7000 ft.—Cache la Poudre River; 
Ft. Collins; New Windsor; Boulder; Horsetooth Gulch; Cimarron; Florence. 
33. Senecio salicinus Rydb. In the mountains of Colo.—Alt. 5000-6000 ft. 
—Foot-hills, Larimer Co.; Veta Pass; Owl Canon, Larimer Co. 
34. Senecio canovirens Rydb. In the mountains of Colo, and N. M.—Alt. 
6000-10,000 ft.—Florence; Williams Canon; Colorado Springs; Manitou; 
Georgetown; Pike’s Peak; Buckhorn Creek. 
35. Senecio rosulatus Rydb. On hills and mountains of Colo.—Alt. 5000- 
13,000 ft.—Cameron Pass; Dillon Canon; Trinidad; Pike’s Peak; foot-hills 
west of Ft. Collins; Georgetown; Chambers’ Lake; Gray’s Peak ; Sangre de 
Cristo Creek; Manitou; Grayback mining camps; Artists’ Glen, near Pike’s 
Peak; Green Mountain Falls; North Cheyenne Canon; mountain sides near 
Georgetown; Silver Plume; New Windsor; Marshall Pass; Dark Canon; 
Horsetooth Gulch; dry hills near Wood’s ranch; near Narrows; Howe’s 
Gulch; Rist Canon; Baxter’s ranch; above Beaver Creek; Caribou ; Cheyenne 
Mountain; mountain sides near Golden; Bottomless Pit; Twin Lakes; Canon 
City; Empire; Boulder; between Sunshine and Ward. 
36. Senecio Fendleri A. Gray. On mountains from Colo, to Utah and N. M. 
—Alt. 8000-13,000 ft.—Manitou; Mt. Ouray; Bottomless Pit; Ojo; hills north 
of Cascade; mountains near Colorado Springs; Grayback mining camps; 
Clear Creek; Hematite. 
37. Senecio lanatifolius Osterhout. (S. Fendleri lanatus Osterhout) In 
the mountains of Colo.—Wolcott, Eagle Co. 
38. Senecio multilobatus T. & G. On dry plains of Colo, and Utah.—Alt. 
about 7000 ft.—Dolores; Canon of the Grand, above Palisades; Steamboat 
Springs; Grand Junction; Mancos; Minturn. 
39. Senecio condensatus Greene. (S', aureus compactus A. Gray; N. com- 
pactus Rydb.) On dry plains and in sandy soil in Neb. and Colo.—Trinidad; 
Table Rock; Colorado Springs. 
40. Senecio tridenticulatus Rydb. On dry plains from Colo, to Tex.—Alt. 
7000-S000 ft.—Cottonwood Creek, Buena Vista; hills southeast of La Veta. 
41. Senecio oblanceolatus Rydb. On dry plains and hills from Wyo. to Tex. 
—Alt. 4000-10,000 ft.—Arboles; Los Pinos; Pike’s Peak; Calhan; Como, 
South Park; El Paso Co.; mesas near Colorado Springs; Cucharas Valley, 
near La Veta; plains near Denver; Sangre de Cristo Creek; Turkey Creek 
and tributaries; Cottonwood Creek, near Buena Vista; Quimby; hills about 
Trinidad; Como; Clear Creek. 
42. Senecio longipetiolatus Rydb. In valleys of Wyo. and Colo.— Alt. up 
to 9000 ft.—Medicine Bow Range; Hamor’s Lake, north of Durango. 
43. Senecio crocatus Rydb. (S. aureus croceus A. Gray; N. dimorphophyl- 
lus Greene; .S', heterodoxus Greene) On the higher mountains of Wyo. and 
Colo.—Alt. 10,000-14,000 ft.—Pike’s Peak Valley; Mt. Harvard; near Pagosa 
Peak; Cameron Pass; summit of mountains west of North Park; Little Kate 
Mine, La Plata Mountains; Alpine Tunnel; South Cottonwood Gulch, Chaffee 
Co.; Long’s Peak; Red Mountain; Berthoud Pass; Grass Creek ; Red River; 
Beaver Creek; Gray’s Peak; summit of North Park Range, Larimer Co. 
